Adding Auxiliary Fuse Block

[WTITW]

Can anybody give me a little electrical advice on adding a new fuse block for some accessories. I want to add a few circuits for 12v sockets / USB in the back, strip lights, maybe a couple other things. Eventually I want this on an aux battery system but given the current Covid crazzy-ness, I'm looking to skip the cost of a second battery system for the time being and just tie the new fuse block into the existing battery.

Can anybody give me some advice on how to tie it in in a way that will allow me. to swap it over to a second battery system later? I was thinking of putting the whole new fuse block on a relay tied into an existing accessory circuit but not sure how to do that or if it's the best course of action. I was thinking that since the accessory is on a 1hr timer I would have a bit more protection than wiring it direct or with a master switch. Can I just find any hot wire with the accessory switched on and tap into that for the relay to activate the new fuse block?

Any advice would be greatly appreciated. New to off roading. Thanks!

 

[ChiTown]

None of the factory wiring in the rear is going to handle what you're looking to do.

I would consider wiring it up like you have the second battery for the front to rear section as far as cable routing that way you don't have to do it twice.

Most items you will use on 12V will be fused on their power cords so there's no real reason to run a full fuse block in the rear. You just can run one 30A up front near the battery to protect the main cable.

I run a Bosch 50A relay with a manual switch to control the rear power but you could easily have it controlled by ignition power if you only want it in with the ignition switch is on.

 

[r2m]

This is how I did my power to the rear: Builds - R2M 2013 GX460 Overland Build
post #31 and also the next page.